First part sounds like blocked pilot jets normally associated with bike which is left idle for months on the side stand.
Second Engine compression on the 400 is 217psi standard and anything under 174psi is consider low, but still works unless it is less than150psi which makes them difficult to start cold
compresion should be measured with the throttle open full.
Leak down does not look right at all and looks more like a sealing issue with the equipment you are using. The leak down tester requires a very good seal as does the compression tester. Check the plug holes for debris which could cause sealing issues.
I have seen the odd issue with bad rings but most compression problems I have seen on the 400 is valves leaking, usually from burned exhaust valves.
Second Engine compression on the 400 is 217psi standard and anything under 174psi is consider low, but still works unless it is less than150psi which makes them difficult to start cold
compresion should be measured with the throttle open full.
Leak down does not look right at all and looks more like a sealing issue with the equipment you are using. The leak down tester requires a very good seal as does the compression tester. Check the plug holes for debris which could cause sealing issues.
I have seen the odd issue with bad rings but most compression problems I have seen on the 400 is valves leaking, usually from burned exhaust valves.